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Инструкции по анализу логов для сбора статистики
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org.mos.analytics/Анализ логов.md

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Анализ логов

Введение

Во время своей работы ОС Linux ведет журнал происходящих событий уровня ядра и userspace. Стоит задача извлекать из журнала события, представляющие интерес для аналитики и статистики.

Лог в текстовом формате можно получить следующей командой от root:

journalctl -b 0

Лог в формате JSON можно получить следующей командой от root:

journalctl -b 0 -o json

Пример находится в data/journalctl.txt

Для форматирования JSON можно использовать утилиту jq(1):

journalctl -b 0 -o json | jq "."

data/journalctl.json

Далее по тексту приводятся выдержки из этих файлов. Т.к. формат JSON обычно удобнее для машинной обработки, приводятся выдержки из него. Все те же самые события есть и в текстовом формате.

Механизм централизованного сбора логов находится за рамками настоящего документа.

Уникальный идентификатор устройства находится в файле /etc/machine-id. При установке по PXE необходимо обеспечивать его уникальность.

События

Включение устройства

Это первое сообщение в логе. В качестве сообщения выводится uname.

{
  "_TRANSPORT": "kernel",
  "_SOURCE_MONOTONIC_TIMESTAMP": "0",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2290;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=4fca9f;t=5e8a389e7ec27;x=b5c2a95c90f7981c",
  "PRIORITY": "5",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "__REALTIME_TIMESTAMP": "1663163974544423",
  "SYSLOG_FACILITY": "0",
  "__MONOTONIC_TIMESTAMP": "5229215",
  "_HOSTNAME": "ncco-2-icl1.local",
  "SYSLOG_IDENTIFIER": "kernel",
  "MESSAGE": "Linux version 5.10.137-std-def-alt1 (builder@localhost.localdomain) (gcc-10 (GCC) 10.3.1 20210703 (ALT Sisyphus 10.3.1-alt2), GNU ld (GNU Binutils) 2.35.2.20210110) #1 SMP Wed Aug 24 12:31:53 UTC 2022"
}

Выключение устройства

Рекомендуется ориентироваться на вход системы в target systemd poweroff.target

{
  "_SYSTEMD_SLICE": "-.slice",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "MESSAGE": "Reached target System Power Off.",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2ce0;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=809f16e0;t=5e8a409eca4e6;x=ab8da413467f46ce",
  "_EXE": "/lib/systemd/systemd",
  "UNIT": "poweroff.target",
  "CODE_FUNC": "job_emit_done_message",
  "TID": "1",
  "_COMM": "systemd",
  "SYSLOG_FACILITY": "3",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_SOURCE_REALTIME_TIMESTAMP": "1663166122337374",
  "CODE_LINE": "713",
  "_SYSTEMD_UNIT": "init.scope",
  "_CMDLINE": "/sbin/init splash",
  "_UID": "0",
  "SYSLOG_IDENTIFIER": "systemd",
  "CODE_FILE": "src/core/job.c",
  "__REALTIME_TIMESTAMP": "1663166122337510",
  "MESSAGE_ID": "39f53479d3a045ac8e11786248231fbf",
  "_SYSTEMD_CGROUP": "/init.scope",
  "__MONOTONIC_TIMESTAMP": "2157909728",
  "INVOCATION_ID": "1a99252c4e3a4100b16709983339fcc4",
  "_TRANSPORT": "journal",
  "_GID": "0",
  "_PID": "1",
  "JOB_ID": "3255",
  "PRIORITY": "6",
  "JOB_TYPE": "start",
  "_CAP_EFFECTIVE": "1ffffffffff",
  "JOB_RESULT": "done",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d"
}

Логин в устройство

Можно смотреть события PAM, например:

{
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=280f;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=e36ed39;t=5e8a397cf0ec1;x=53746d37c153ddc",
  "MESSAGE": "pam_tcb(sddm:auth): Authentication passed for teacher from (uid=0)",
  "__MONOTONIC_TIMESTAMP": "238480697",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_CMDLINE": "/usr/libexec/sddm/sddm-helper --socket /tmp/sddm-authadababf6-da82-470f-a58a-f09332c714af --id 1 --start /usr/lib/kf5/bin/startplasma-x11 --user teacher",
  "_SYSTEMD_CGROUP": "/system.slice/prefdm.service",
  "_SYSTEMD_INVOCATION_ID": "d01e87e665194c96a1e2260288444968",
  "_UID": "0",
  "_COMM": "sddm-helper",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_TRANSPORT": "syslog",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "SYSLOG_TIMESTAMP": "Sep 14 17:03:27 ",
  "_PID": "2761",
  "_SOURCE_REALTIME_TIMESTAMP": "1663164207795860",
  "PRIORITY": "6",
  "_GID": "0",
  "_SYSTEMD_UNIT": "prefdm.service",
  "_EXE": "/usr/libexec/sddm/sddm-helper",
  "_CAP_EFFECTIVE": "1ffffffffff",
  "_SYSTEMD_SLICE": "system.slice",
  "SYSLOG_FACILITY": "10",
  "__REALTIME_TIMESTAMP": "1663164207795905",
  "SYSLOG_IDENTIFIER": "sddm-helper"
}

Однако будет удобнее ориентироваться на запуск user-$UID.slice:

{
  "_SYSTEMD_CGROUP": "/init.scope",
  "SYSLOG_FACILITY": "3",
  "_UID": "0",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "JOB_RESULT": "done",
  "SYSLOG_IDENTIFIER": "systemd",
  "__REALTIME_TIMESTAMP": "1663164207801126",
  "JOB_ID": "1480",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=281a;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=e37019e;t=5e8a397cf2326;x=3103dcbe46f278c8",
  "_CMDLINE": "/sbin/init splash",
  "PRIORITY": "6",
  "_GID": "0",
  "_SYSTEMD_UNIT": "init.scope",
  "INVOCATION_ID": "11a0b0538275491d9f27021fde8251a5",
  "CODE_FUNC": "job_emit_done_message",
  "MESSAGE_ID": "39f53479d3a045ac8e11786248231fbf",
  "UNIT": "user-500.slice",
  "__MONOTONIC_TIMESTAMP": "238485918",
  "_COMM": "systemd",
  "JOB_TYPE": "start",
  "CODE_LINE": "713",
  "CODE_FILE": "src/core/job.c",
  "_SOURCE_REALTIME_TIMESTAMP": "1663164207801121",
  "_CAP_EFFECTIVE": "1ffffffffff",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_HOSTNAME": "ncco-2-icl1.local",
  "TID": "1",
  "_SYSTEMD_SLICE": "-.slice",
  "_EXE": "/lib/systemd/systemd",
  "_TRANSPORT": "journal",
  "MESSAGE": "Created slice User Slice of UID 500.",
  "_PID": "1"
}

Блокировка устройства

Сейчас нормально не логируется. Можно попробовать сделать службу, запускаемую при наступлении нужной target systemd. Или что-то делать (писать в лог), когда polkit выдает разрешение на блокировку.

Разблокировка устройства

Стоит повысить качество логирования приблизительно как описано выше, однако можно видеть события, когда разблокировщик прошел авторизацию:

{
  "SYSLOG_FACILITY": "10",
  "_SOURCE_REALTIME_TIMESTAMP": "1663164791279391",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_EXE": "/usr/libexec/kf5/kcheckpass",
  "_SYSTEMD_USER_SLICE": "-.slice",
  "PRIORITY": "6",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_SYSTEMD_INVOCATION_ID": "9297989dd5504b23a850c1a77e02d08c",
  "_TRANSPORT": "syslog",
  "SYSLOG_PID": "3495",
  "_GID": "500",
  "SYSLOG_TIMESTAMP": "Sep 14 17:13:11 ",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "_UID": "500",
  "SYSLOG_IDENTIFIER": "kcheckpass",
  "__CURSOR": "s=67dc1471c824495d8b7ca28b2a9a0b85;i=2939;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=3148c14d;t=5e8a3ba964f53;x=f7329ba3eda2e7c7",
  "_SYSTEMD_SLICE": "user-500.slice",
  "_SYSTEMD_OWNER_UID": "500",
  "_SYSTEMD_CGROUP": "/user.slice/user-500.slice/session-4.scope",
  "_SYSTEMD_SESSION": "4",
  "_CMDLINE": "kcheckpass -m classic -S 30",
  "_CAP_EFFECTIVE": "0",
  "_AUDIT_LOGINUID": "500",
  "__REALTIME_TIMESTAMP": "1663164791279443",
  "_AUDIT_SESSION": "4",
  "_PID": "3495",
  "MESSAGE": "pam_tcb(kf5-screenlocker:auth): Authentication passed for teacher from teacher(uid=500)",
  "_SYSTEMD_UNIT": "session-4.scope",
  "_COMM": "kcheckpass",
  "__MONOTONIC_TIMESTAMP": "826851661"
}

Подключение стороннего устройства

Данные события отражаются в логе ядра (dmesg) и дублируются в journalctl, при необходимости можно вешать ionotify на /sys.

Подключение USB-флешки:

{
  "PRIORITY": "6",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "SYSLOG_IDENTIFIER": "kernel",
  "_SOURCE_MONOTONIC_TIMESTAMP": "852503228",
  "__REALTIME_TIMESTAMP": "1663164816917389",
  "_KERNEL_DEVICE": "+usb:1-2",
  "_TRANSPORT": "kernel",
  "MESSAGE": "usb 1-2: new high-speed USB device number 4 using xhci_hcd",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=293d;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=32cff589;t=5e8a3bc1d838d;x=564ac454a42de005",
  "__MONOTONIC_TIMESTAMP": "852489609",
  "_KERNEL_SUBSYSTEM": "usb",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "SYSLOG_FACILITY": "0"
}

{
  "_KERNEL_DEVICE": "+usb:1-2:1.0",
  "PRIORITY": "6",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2940;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=32d2859b;t=5e8a3bc2013a1;x=30d8b837a01ad916",
  "_KERNEL_SUBSYSTEM": "usb",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_UDEV_SYSNAME": "1-2:1.0",
  "SYSLOG_IDENTIFIER": "kernel",
  "__MONOTONIC_TIMESTAMP": "852657563",
  "MESSAGE": "usb-storage 1-2:1.0: USB Mass Storage device detected",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_TRANSPORT": "kernel",
  "_SOURCE_MONOTONIC_TIMESTAMP": "852671778",
  "__REALTIME_TIMESTAMP": "1663164817085345",
  "SYSLOG_FACILITY": "0",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d"
}

{
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=294c;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=32e33ee3;t=5e8a3bc30cce8;x=f090741ef2f21e1e",
  "PRIORITY": "5",
  "_SOURCE_MONOTONIC_TIMESTAMP": "853767704",
  "_HOSTNAME": "ncco-2-icl1.local",
  "SYSLOG_IDENTIFIER": "kernel",
  "_KERNEL_SUBSYSTEM": "scsi",
  "_UDEV_SYSNAME": "3:0:0:0",
  "_TRANSPORT": "kernel",
  "MESSAGE": "sd 3:0:0:0: [sdb] Attached SCSI removable disk",
  "__REALTIME_TIMESTAMP": "1663164818181352",
  "__MONOTONIC_TIMESTAMP": "853753571",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "_KERNEL_DEVICE": "+scsi:3:0:0:0",
  "SYSLOG_FACILITY": "0"
}

Отключение стороннего устройства

Отключение USB-флешки:

{
  "__REALTIME_TIMESTAMP": "1663165049801310",
  "_KERNEL_SUBSYSTEM": "usb",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_UDEV_SYSNAME": "1-2",
  "MESSAGE": "usb 1-2: USB disconnect, device number 4",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "_UDEV_DEVNODE": "/dev/bus/usb/001/004",
  "PRIORITY": "6",
  "_KERNEL_DEVICE": "c189:3",
  "__MONOTONIC_TIMESTAMP": "1085373528",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_SOURCE_MONOTONIC_TIMESTAMP": "1085390460",
  "SYSLOG_FACILITY": "0",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2abc;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=40b17c58;t=5e8a3c9ff0a5e;x=ef8248b678039a0f",
  "_TRANSPORT": "kernel",
  "SYSLOG_IDENTIFIER": "kernel"
}

Подключение к Wi-Fi

{
  "SYSLOG_PID": "2443",
  "_CAP_EFFECTIVE": "200534e2",
  "__REALTIME_TIMESTAMP": "1663164210362279",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_GID": "0",
  "CODE_LINE": "2483",
  "_SYSTEMD_INVOCATION_ID": "9bb6fc2091444ee9856ef1db55a5def0",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=28b0;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=e5e161f;t=5e8a397f637a7;x=ee8629ba9894c074",
  "NM_DEVICE": "wlp0s20f3",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "__MONOTONIC_TIMESTAMP": "241047071",
  "PRIORITY": "6",
  "SYSLOG_IDENTIFIER": "NetworkManager",
  "NM_LOG_LEVEL": "INFO",
  "CODE_FILE": "src/core/devices/wifi/nm-device-wifi.c",
  "_SYSTEMD_SLICE": "system.slice",
  "NM_LOG_DOMAINS": "WIFI,DEVICE",
  "_SOURCE_REALTIME_TIMESTAMP": "1663164210362119",
  "_SYSTEMD_CGROUP": "/system.slice/NetworkManager.service",
  "_PID": "2443",
  "_UID": "0",
  "TIMESTAMP_MONOTONIC": "235.046905",
  "_SYSTEMD_UNIT": "NetworkManager.service",
  "_COMM": "NetworkManager",
  "_CMDLINE": "/usr/sbin/NetworkManager --no-daemon",
  "MESSAGE": "<info>  [1663164210.3621] device (wlp0s20f3): Activation: (wifi) Stage 2 of 5 (Device Configure) successful. Connected to wireless network \"DigitalCenter_5G\"",
  "_EXE": "/usr/sbin/NetworkManager",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "TIMESTAMP_BOOTTIME": "241.046905",
  "_TRANSPORT": "journal",
  "SYSLOG_FACILITY": "3"
}

Отключение Wi-Fi

{
  "MESSAGE": "<info>  [1663164926.3556] device (wlp0s20f3): state change: activated -> deactivating (reason 'user-requested', sys-iface-state: 'managed')",
  "__REALTIME_TIMESTAMP": "1663164926355785",
  "SYSLOG_FACILITY": "3",
  "_EXE": "/usr/sbin/NetworkManager",
  "NM_DEVICE": "wlp0s20f3",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "_SYSTEMD_INVOCATION_ID": "9bb6fc2091444ee9856ef1db55a5def0",
  "_UID": "0",
  "TIMESTAMP_MONOTONIC": "955.927898",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=29fa;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=3955db44;t=5e8a3c2a36949;x=8d461b4a324f3fb9",
  "_SYSTEMD_CGROUP": "/system.slice/NetworkManager.service",
  "CODE_LINE": "16516",
  "_CMDLINE": "/usr/sbin/NetworkManager --no-daemon",
  "TIMESTAMP_BOOTTIME": "961.927898",
  "CODE_FILE": "src/core/devices/nm-device.c",
  "PRIORITY": "6",
  "SYSLOG_PID": "2443",
  "_CAP_EFFECTIVE": "200534e2",
  "_GID": "0",
  "NM_LOG_LEVEL": "INFO",
  "_SYSTEMD_UNIT": "NetworkManager.service",
  "_SYSTEMD_SLICE": "system.slice",
  "SYSLOG_IDENTIFIER": "NetworkManager",
  "_TRANSPORT": "journal",
  "NM_LOG_DOMAINS": "DEVICE",
  "__MONOTONIC_TIMESTAMP": "961928004",
  "_PID": "2443",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_SOURCE_REALTIME_TIMESTAMP": "1663164926355747",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_COMM": "NetworkManager"
}

Подключение Ethernet

{
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_COMM": "NetworkManager",
  "__MONOTONIC_TIMESTAMP": "1040164086",
  "NM_LOG_DOMAINS": "DEVICE",
  "_UID": "0",
  "_GID": "0",
  "TIMESTAMP_MONOTONIC": "1034.164025",
  "TIMESTAMP_BOOTTIME": "1040.164025",
  "NM_DEVICE": "enp0s31f6",
  "CODE_LINE": "16738",
  "_CMDLINE": "/usr/sbin/NetworkManager --no-daemon",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2a4e;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=3dffa4f6;t=5e8a3c74d32fc;x=9effed904fd09e8b",
  "_SOURCE_REALTIME_TIMESTAMP": "1663165004591824",
  "_SYSTEMD_SLICE": "system.slice",
  "_SYSTEMD_CGROUP": "/system.slice/NetworkManager.service",
  "SYSLOG_PID": "2443",
  "_CAP_EFFECTIVE": "200534e2",
  "_PID": "2443",
  "SYSLOG_FACILITY": "3",
  "CODE_FILE": "src/core/devices/nm-device.c",
  "__REALTIME_TIMESTAMP": "1663165004591868",
  "SYSLOG_IDENTIFIER": "NetworkManager",
  "_HOSTNAME": "ncco-2-icl1.local",
  "MESSAGE": "<info>  [1663165004.5918] device (enp0s31f6): Activation: successful, device activated.",
  "NM_LOG_LEVEL": "INFO",
  "_TRANSPORT": "journal",
  "_SYSTEMD_INVOCATION_ID": "9bb6fc2091444ee9856ef1db55a5def0",
  "PRIORITY": "6",
  "_EXE": "/usr/sbin/NetworkManager",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "_SYSTEMD_UNIT": "NetworkManager.service"
}

Отключение Ethernet

Событие физического отсоединения кабеля:

{
  "__REALTIME_TIMESTAMP": "1663165006597376",
  "__MONOTONIC_TIMESTAMP": "1042169594",
  "_UDEV_SYSNAME": "0000:00:1f.6",
  "PRIORITY": "6",
  "_BOOT_ID": "b7c4b78ba3cb403ea89f99ea2801a34d",
  "_MACHINE_ID": "446da133a2cb49efbe840eb66307756b",
  "_KERNEL_DEVICE": "+pci:0000:00:1f.6",
  "_HOSTNAME": "ncco-2-icl1.local",
  "_TRANSPORT": "kernel",
  "MESSAGE": "e1000e-ext 0000:00:1f.6 enp0s31f6: NIC Link is Down",
  "SYSLOG_IDENTIFIER": "kernel",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2a56;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=3e1e3efa;t=5e8a3c76bcd00;x=9fcd1e133f0bb261",
  "SYSLOG_FACILITY": "0",
  "_KERNEL_SUBSYSTEM": "pci",
  "_SOURCE_MONOTONIC_TIMESTAMP": "1042186286"
}

Событие программного выключения (в данном случае оно автоматически последовало за физическим отсоединением кабеля):

{
  "_SOURCE_REALTIME_TIMESTAMP": "1663165012599797",
  "_CMDLINE": "/usr/sbin/NetworkManager --no-daemon",
  "TIMESTAMP_BOOTTIME": "1048.171939",
  "SYSLOG_IDENTIFIER": "NetworkManager",
  "NM_LOG_DOMAINS": "DEVICE",
  "CODE_FILE": "src/core/devices/nm-device.c",
  "SYSLOG_FACILITY": "3",
  "_SYSTEMD_SLICE": "system.slice",
  "_TRANSPORT": "journal",
  "NM_DEVICE": "enp0s31f6",
  "MESSAGE": "<info>  [1663165012.5997] device (enp0s31f6): state change: activated -> unavailable (reason 'carrier-changed', sys-iface-state: 'managed')",
  "__CURSOR": "s=b45ff6a034b548efbbc4ddb9caf572a2;i=2a57;b=b7c4b78ba3cb403ea89f99ea2801a34d;m=3e79d622;t=5e8a3c7c76428;x=1140c064ad71ca6a",
  "PRIORITY": "6",
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}